HDMI high-definition video optical fiber transmission group loop-out transmits high-definition video signals over long distances through optical fibers, and supports serial port data transmission and external independent audio and other functions, which can adapt to a variety of complex application environments. The device uses the most advanced video processing chip, has excellent image processing and transmission capabilities, makes the signal transmission more smooth and stable, and is a reliable, high-performance, and efficient way to extend the HDMI signal. At the same time, the device also has the function of network management, which can monitor the running status of each signal in real time on the mobile APP and PC, and provide abnormal prompts for the operation status, which provides great convenience for providing abnormal elimination.